NEUMATICO

• Main Authors: FUJINO, KENTARO, MATSUI, HIDEKI
• Format: Patent
• Language: Spanish
• Published: 01.07.2000
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

SE DESCRIBE UNA LLANTA NEUMATICA, QUE COMPRENDE UNA LLANTA EN LA QUE SE PROVEE UNA CAPA DE CAUCHO, AL MENOS EN LA PORCION QUE ESTA EN CONTACTO CON LA SUPERFICIE DE LA CARRETERA, TENIENDO DICHA CAPA DE CAUCHO ALVEOLOS CERRADOS Y UN RADIO DE EXPANSION DE APROX. ENTRE EL 2 Y EL 50 %. LA FASE DE CAUCHO SOLIDO DE DICHO CAUCHO ALVEOLAR CONTIENE, EN UNA CANTIDAD COMPRENDIDA ENTRE APROX. 0,5 Y 5 PARTES EN PESO POR 100 PARTES EN PESO DEL COMPONENTE DE CAUCHO, UN ACELERADOR DE VULCANIZACION REPRESENTADO POR UNA DE LAS FORMULAS SIGUIENTES: DONDE R{SUP,1} Y R{SUP,2} CADA UNO INDEPENDIENTEMENTE, REPRESENTA UN ATOMO O UN GRUPO SELECCIONADO ENTRE UN ATOMO DE HIDROGENO, GRUPOS ALQUILO Y GRUPOS ALQUILO, EXCLUYENDO EL CASO EN EL QUE R{SUP,1} Y R{SUP,2} REPRESENTAN CADA UNO SIMULTANEAMENTE UN ATOMO DE HIDROGENO. LA LLANTA NEUMATICA DESCRITA SE UTILIZA COMO UNA LLANTA SIN TACOS EXCELENTE, ELIMINA EL DETERIORO EN EL FUNCIONAMIENTO SOBRE HIELO O NIEVE EN EL PERIODO FINAL DE UTILIZACION DE LA LLANTA, RESPECTO ALFUNCIONAMIENTO EN EL PERIODO INICIAL DE UTILIZACION. A pneumatic tire comprising a tire tread wherein a foamed rubber layer is provided at least in the portion substantially contacting with a road surface, and wherein said foamed rubber layer, which has closed cells, has an expansion ratio of about 2% to about 50%, and the solid rubber phase in said foamed rubber layer contains, in an amount of about 0.5 to about 5 parts by weight per 100 parts by weight of the rubber component, a vulcanization accelerator represented by one of the following general formula: wherein R and R each independently represents an atom or a group selected from a group consisting of a hydrogen atom, alkyl groups, and aryl groups, excluding a case in which each of R and R simultaneously represents a hydrogen atom. The pneumatic tire which is used as an excellent studless tire suppresses deterioration in performance on ice or snow in the final period of tire use compared to the performance in the initial period of tire use.